Sewing-machine needle.



L. GARBUS.

SEWING MACHINE NEEDLE.

APPLICATION FILED SEPT. 17. I917- I VITNESS: IN VEN TOR.

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SEWING-MACHINE. nniinnnw Specificationpf Letters Patent. Pat nted Dec. 10,1918.

' Application filed September 17, 1 51' Serial No. 191,657.

fl 0 all whom. it may concern:

Be it known that I, LUDWIK subject of the Emperor of Austria, resident of Detroit, county of Wayne, and State of Michigan, have invented certain new and useful Improvements in Sewing-Machine Needles, of which the following is a specification.

This invention relates to improvements in sewing machine needles and means for attaching the same to needle bars, and has as its principal object the provision of means whereby the insertion of the needle within the bar is facilitated and readily held without the use of screw-operated clamping means.

A further object is to provide such means in forms which are readily constructed and which present a neat appearance.

These and other like objects are attained by the novel construction of parts hereafter described and shown in the accompanying drawing, forming a material part of this disclosure, and in which Figure 1 is a fragmental sectional view of a needle bar made in accordance with the invention.

Fig. 2 is a side elevational view of the needle.

Fig. 3 is an enlarged transverse sectional view taken on line 3-3 of Fig. 2.

Fig. 4 is a side elevational view of a needle bar.

Fig. 5 is a view similar to Fig. 1, but showing the needle in position for operation.

Fig. 6 is a perspective view of the engaging means.

In the drawings, the needle bar, represented by the numeral 10, is formed with an elongated axial bore 11, in which at its lower end is a key-like projection 12, and a transverse drilled hole 14, which extends through the wall to the bore, in which is fitted a rectangular stem 16, the same being slidably maintained by the flat spring 17, secured to the needle bar by the screw 18.

The spring 17 presses against an integrally formed collar 19, beyond which extends a threaded stem 20, adapted to be engaged by the knurled knob 22, in such manner that the parts may be associated by removing the nutand screw 18, thereby freeing the spring which normally presses the stem 16 inwardly.

The needle 25 is formed with an eye 26 GARBUs,

in its lower extremity, and has secured to' it or formed with it a shank 27, the upper cylindrical portion 28 of which has formed in it a keyway or groove 29, terminating in an annular recess or groove 30, the keyway being adapted to engage with the projection 12 when the shank is inserted in the opening 11.

In operation, the shank is inserted, the projection 12 entering the recess 30, whereupon the needle is raised and partially rotated, bringing the groove 29 into position to receive the extending inner end of the rectangular stem 16, which prevents the needle from further turning until it is desired to withdraw the same, which is accomplished by grasping the knob 22 and retracting the stem from the groove, allowing the needle to be rotated until the groove is turned into position to again engage with the projection 12 and the needle shank withdrawn.

The construction and operation having been clearly disclosed, what I claim as new, and desire to secure by Letters Patent, is

1. In a sewing machine needle attaching means, the combination with a needle bar having an axial cylindrical opening in its lower end, of a projection extending into said opening, a needle having a shank suited to said opening, an annular recess formed in the shank of said needle, a groove in said shank leading thereto, said groove being engageable with said projection, and a spring pressed plunger engageable within said groove, whereby the needle is held in position.

2. In a sewing machine needle securing device, the combination with a needle bar, of a rectangular plunger slidable transversely through the walls of said bar, a cylindrical axial opening in said bar, a projection extending into said opening at the lower end thereof, and at right angles to said opening, resilient means for pressing said plunger inwardly, means permitting the retraction of said plunger, a needle having an annularly recessed shank and containing an elongated groove extending from the annular recess to the end of the shank, and means permitting said needle to be turned when fully entered in the opening in said needle bar, whereby said plunger may enter the mentioned groove.

3. In a sewing machine needle'securing device, the combination with a needle bar having an axial cylindrical opening at its shank having a grooved upper end engage lower end, a plunger movable transversely able with said plunger, and an annular rethrough said needle bar intersecting said cess in said needle shank engageable With 10 opening, means for normally keeping said the shank formed on said plunger.

5 plunger in a forward position, means for In testimony whereof I have afiixed my retracting said plunger, a needle having a signature. shank suited to said opening, said needle LUDWVIK GARBUS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, 7 Washington, D. G. 

